Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Richard A. Zak, MD, Inc

Organization Gastroenterology Physician · NPI 1821316944

Richard A. Zak, MD, Inc provides Gastroenterology Physician services in Chico, California. Licensed in California. Registered with an NPI since 2010.

Licensed in
CA
In the registry since
2010
What do these letters mean?
Inc — Incorporated
A form of business registration, not a clinical qualification.

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Practice location Address checks out

251 Cohasset Rd Ste 300
Chico, CA 95926-2241 Not confirmed with CMS for 15 years — call before visiting
Phone: (530) 894-8800
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence G43123 (CA)

Record details

NPI number1821316944
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Lorraine Fingleton — Office Manager · (530) 894-8800
NPI enumeratedMay 13, 2010
Last updated in NPPESJune 28, 2011
Mailing addressPo Box 1096, Mansfield, OH 44901-1096

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